Bold Plagiarist

A parasite that turns an opponent's investments into your own. The design inverts the entire point of counters: they exist to make a creature bigger, more permanent, more threatening, so an effect that mirrors every counter an opponent stacks onto their own creatures functions as a tax on their growth. Flash is doing real work here, letting it dodge sorcery-speed removal and ambush a proliferate or a +1/+1 pileup before it lands. Cast it at end of turn or in response, and the counters an opponent was about to enjoy also swell a 2/2 body that started with none. Note the exactness. It copies "the same number and kind," and it only fires off counters an opponent puts on a creature they control, so a rush of +1/+1 counters is the obvious gift, but keyword counters (flying, deathtouch, indestructible) come along too, which occasionally hands you an ability the plan never intended to share. The narrowness is baked in: it never mirrors what you build, never what a counter goes onto that is not a creature, and does nothing against a board that grows the old-fashioned way through raw stats and tokens. That is the tension it lives on. It is a punisher aimed squarely at counter-matters strategies, inert without one across the table, but when the board is leaning hard on +1/+1 synergies, holding up four mana to flash in a creature that snowballs off someone else's plan is a genuinely mean thing to do.